A three-year-old local company that has built an online health care recruitment platform has secured investment from Nashville investment firms Heritage Group and Frist Cressey Ventures.

Relode’s principals, led by founders Matthew Tant and Joe Christopher, plan to use some the funds — the company is not disclosing full details but a filing with regulators puts the amount at $8.1 million — to launch a temporary staffing arm to go with the permanent nurse and clinical leadership staffing services. That expansion also will adds physicians, physician assistants and nurse practitioners to Relode’s model, which replaces a third-party search agency with a network of more than 20,000 health care professionals and clinicians, many of them virtual agents who are paid referral fees well below those of search firms…